|Year|Domestic passengers|International passengers|Total passengers|Change|
|---|---|---|---|---|
|2006|764,831|83,115|847,946|+4.6%|
|2007|764,674|75,276|839,950|−0.9%|
|2008|709,779|92,176|801,955|−4.5%|
|2009|605,534|82,424|687,958|−14.3%|
|2010|595,457|105,119|700,576|+1.7%|
|2011|850,305|123,607|973,912|+39.1%|
|2012|899 854|178,679|1,078,533|+10.7%|
|2013|745,178|131,902|877,080|-18.7%|

Question: how many years showed a positive increase?
Answer: 4